an engine of one or more working cylinders in which the process of combustion takes place within the cylinder.

a heat engine in which combustion occurs inside the engine rather than in a separate furnace; heat expands a gas that either moves a piston or turns a gas turbine

Any engine, either reciprocating or rotary, in which the fuel is consumed in the interior of the engine rather than outside of the engine. LAMINATED WINDSHIELD A windshield consisting of a thin layer of rubbery plastic sandwiched between two sheets of glass. When struck by the head in an accident, it bows out without puncturing, and the plastic holds the glass to prevent it from splintering.

One in which fuel is ignited within the combustion chambers.

An engine that burns the air/fuel mixture in a chamber inside the engine cylinder, like a conventional reciprocating engine or a rotary engine.